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If $A,B∈ℂ^{n×n}$ does $ABAB=0$ imply $BABA=0$?	hbghlyj 2022-8-14 00:21	192	hbghlyj 2023-3-20 17:03
Law of the unconscious statistician	hbghlyj 2023-3-10 07:32	155	hbghlyj 2023-3-10 07:38
classification of finitely generated abelian groups	hbghlyj 2023-3-9 16:58	250	hbghlyj 2023-3-9 17:05
range of projection is invariant under a linear operator	hbghlyj 2023-3-8 04:12	142	Czhang271828 2023-3-8 15:31
not equivalent to any matrix in Smith normal form	hbghlyj 2023-3-4 02:33	555	hbghlyj 2023-3-6 21:06
two isomorphic $C(ℝ)$-modules whose presentation matrices are not equivalent	hbghlyj 2023-3-4 07:20	1168	hbghlyj 2023-3-6 18:48
$\|A·A\|$ for $A$ a subset of abelian group $G$ not contained in any proper coset	hbghlyj 2023-3-4 08:29	039	hbghlyj 2023-3-4 08:29
continuous functions that have a root 0	hbghlyj 2023-3-1 04:58	147	Czhang271828 2023-3-2 13:17
generalization of Cramer's rule ?	hbghlyj 2023-3-2 09:23	026	hbghlyj 2023-3-2 09:23
⟨2,X⟩≇⨁cyclic modules	hbghlyj 2023-2-21 08:48	354	hbghlyj 2023-2-27 01:02
finitely generated $ℤ$-module	hbghlyj 2023-2-26 08:34	251	Czhang271828 2023-2-26 21:13
factor a linear map $R^m→M$ to linear maps $R^m→R^n$ and $R^n→M$	hbghlyj 2023-2-26 11:21	157	Czhang271828 2023-2-26 17:02
the ℤ-module ℚ has no minimal generating set	hbghlyj 2023-2-26 03:58	131	hbghlyj 2023-2-26 06:56
[Lebesgue integral] Change of variable	hbghlyj 2023-2-24 06:58	232	hbghlyj 2023-2-24 08:55
Why this determinant is nonnegative	orzweb111 2019-3-27 10:32	1647	hbghlyj 2023-2-19 18:58
intersection of two compact subsets in a space may be non-compact and not closed	hbghlyj 2023-1-30 08:13	450	Czhang271828 2023-2-17 15:19
integral domain with the ACCP in which every maximal ideal is principal	hbghlyj 2023-2-11 23:43	034	hbghlyj 2023-2-11 23:43
Is the quotient group $ℝ/ℚ$ the additive group of a ring	hbghlyj 2023-1-24 05:27	148	Czhang271828 2023-2-11 20:16
Legendre’s equation and the Fredholm Alternative	hbghlyj 2023-2-9 06:21	238	hbghlyj 2023-2-10 21:37
not every ideal in $\barℤ$ is finitely generated.	hbghlyj 2023-2-8 06:51	039	hbghlyj 2023-2-8 06:51
Real canonical form	hbghlyj 2022-11-12 21:27	454	hbghlyj 2023-1-13 05:22
Prove a function defined by integral is holomorphic	hbghlyj 2023-1-12 01:56	340	hbghlyj 2023-1-12 22:02
关于Lagrange插值和 LU,QR 分解的12道题	hbghlyj 2023-1-10 22:39	029	hbghlyj 2023-1-10 22:39
minimal polynomial splits⇒diagonalisable	hbghlyj 2023-1-8 22:51	133	hbghlyj 2023-1-8 23:02
[函数] 正交多项式列,满足$f_{n-1}$的根穿插于$f_n$的根	hbghlyj 2022-9-16 01:15	462	hbghlyj 2023-1-6 06:46
complex linearity of the Jacobian	hbghlyj 2023-1-1 05:09	041	hbghlyj 2023-1-1 05:09
Riemann's removable singularity theorem	hbghlyj 2022-9-13 18:12	139	hbghlyj 2022-12-31 05:06
A connected open subset of a normed space is polygonally connected.	hbghlyj 2022-12-29 23:56	031	hbghlyj 2022-12-29 23:56
nested closed sets, lim diam≠0, can intersection be singleton?	hbghlyj 2022-12-15 22:30	264	hbghlyj 2022-12-28 21:41
counting zeros (Rouché's theorem)	hbghlyj 2022-11-20 08:21	143	hbghlyj 2022-12-28 21:28

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